This test exercises basic 'stub methods' functionality.
See basic_resolve.txt for the same test with resolve support.

-- go.mod --
module example.com
go 1.12

-- a/a.go --
package a

type C int

var _ error = C(0) //@quickfix(re"C.0.", re"missing method Error", stub)
-- @stub/a/a.go --
@@ -5 +5,5 @@
+// Error implements error.
+func (c C) Error() string {
+	panic("unimplemented")
+}
+